package it.txt.ens.namespace.osgi.test;
/***************************************************************************
 * Copyright 2012-2013 TXT e-solutions SpA
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * This work was performed within the IoT_at_Work Project
 * and partially funded by the European Commission's
 * 7th Framework Programme under the contract ICT-257367.
 *
 * Authors:
 *      Salvatore Piccione (TXT e-solutions SpA)
 *
 * Contributors:
 *        Domenico Rotondi (TXT e-solutions SpA)
 **************************************************************************/
import it.txt.ens.namespace.osgi.NamespaceInquirerMSF;

import java.io.File;
import java.text.MessageFormat;
import java.util.Dictionary;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Filter;
import org.osgi.framework.ServiceReference;
import org.osgi.service.cm.Configuration;
import org.osgi.service.cm.ConfigurationAdmin;
import org.springframework.ldap.filter.EqualsFilter;

/**
 * @author Salvatore Piccione (TXT e-solutions SpA - salvatore.piccione AT txtgroup.com)
 * @author Domenico Rotondi (TXT e-solutions SpA - domenico.rotondi AT txtgroup.com)
 *
 */
public class Activator implements BundleActivator {
    private static final Logger LOGGER = Logger.getLogger(Activator.class.getName());
    private static final String DEFAULT_CONFIG_DIR = "conf/";
    private static final String CONFIG_FILE = "NamespaceInquirer.properties";
    private static final ResourceBundle LOGGING_MESSAGES = ResourceBundle.getBundle(
            "logging-messages/" + Activator.class.getSimpleName(), Locale.ROOT);
    private Configuration config;
    private ServiceReference<ConfigurationAdmin> configAdminSR;

    /* (non-Javadoc)
     * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
     */
    @Override
    public void start(BundleContext context) throws Exception {
      //retrieve the configuration admin service
        configAdminSR = context.getServiceReference(ConfigurationAdmin.class);
        if (configAdminSR == null)
            throw new Exception("No " + ConfigurationAdmin.class.getName() + " available");
        ConfigurationAdmin configAdmin = context.getService(configAdminSR);
        config = configAdmin.createFactoryConfiguration(NamespaceInquirerMSF.PID, null);
        
        //load the configuration for this bundle
        File configFile = new File (DEFAULT_CONFIG_DIR + CONFIG_FILE);
        Dictionary<String, Object> properties = null;

        try {
            properties = Utils.loadConfiguration(DEFAULT_CONFIG_DIR + CONFIG_FILE);
            //add owner id
            String ownerID = String.valueOf(context.getBundle().getBundleId());
            properties.put(NamespaceInquirerMSF.OWNER_ID, ownerID);
            config.update(properties);
            EqualsFilter ownerIDFilter = new EqualsFilter(NamespaceInquirerMSF.OWNER_ID, ownerID);
            
            Filter filter = context.createFilter(ownerIDFilter.encode());
            NamespaceInquirerTracker tracker = new NamespaceInquirerTracker(context, filter);
            new Thread(tracker,"Namespace Inquirer Tracker").start();
        } catch (Exception e) {
            LOGGER.log(Level.WARNING, MessageFormat.format(
                LOGGING_MESSAGES.getString("errorWhileReadingConfigFile"), 
                configFile.getAbsolutePath()), e);
        }
    }

    /* (non-Javadoc)
     * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
     */
    @Override
    public void stop(BundleContext context) throws Exception {
        config.delete();
        context.ungetService(configAdminSR);
    }

}
